Regal Squat Toilet Flushometers Quiet, Diaphragm Type, Closet Flushometer for top or back inlet squat toilets with the following features:1 I.P.S. Bak-Chek Angle Stop Adjustable Tailpiece Vacuum Breaker High Copper, Low Zinc Brass Castings for Dezincification Resistance Non-Hold-Open Handle or Push Button and No External Volume Adjustment to Ensure Water Conservation Low Consumption flush accuracy controlled by Para-Flo Technology Handle Packing, Stop Seat and Vacuum Breaker Molded from PERMEX Rubber Compound for Chloramine Resistance